I don't know if I should have done new thread or something but if so, someone else can do it.

Ah, so it is bad, unprofessional behavior on both sides. This was basically a tit for tat, with CM initiating the tit. Based on this article, I can't say I feel sorry for him. It's a hard lesson to learn, but hopefully CM now understands that it's bad form to publicly announce your intended departure, before informing your bosses. The fact it was done in a such a public way added boulder sized salt to the wound.